A boring lecture often lacks engagement and excitement, making it difficult for students to stay focused. The speaker may present information in a monotonous tone, using lengthy slides filled with text that do not encourage interaction. This can lead to a passive learning experience, where students struggle to absorb the material. In such lectures, topics like history or mathematics may be covered in a dry manner, with little real-world application or relevance. Without visual aids or stimulating discussions, students may find their minds wandering, resulting in a lack of retention and interest in the subject matter.